【建筑】钻具【建筑】钻孔工具

请准确丈量钻具。

offshore drilling

drilling out (boring out)

slip-type elevator for deep-well drilling rods

adjustable multi-spindle bench drilling machines【机】

rotary-drilling machine with coupling (hitch) for mining

slip-type elevators with deep-well drilling rods

drill (drilling, boring, borehole)

dowel hole drilling machine